Bokeh (Mathematics)

Bokeh in mathematics refers to the visual quality of the out-of-focus areas in a geometric or optical image, often seen as the soft, blurry background behind a sharp subject. It results from the way a camera lens or optical system spreads light from points that are not in focus, creating specific shapes or patterns. Mathematically, bokeh relates to the properties of the lens aperture and how it influences light's wavefront, often analyzed through point spread functions and Fourier optics. Good bokeh is usually smooth and pleasing, enhancing image aesthetic by emphasizing the focused subject while gently blurring the background.